COLUMBIA, Md. — Hand surgeons at MedStar Health facilities in Washington, D.C., and Baltimore have become the first in their respective regions to perform a breakthrough procedure for patients suffering from severe thumb carpometacarpal (CMC) arthritis. The innovative treatment uses a small ball-and-socket implant to restore function while potentially reducing pain and recovery time. Thumb CMC arthritis, also known as basal joint arthritis, affe…